METHOD FOR THERMAL TREATMENT OF PRODUCTS MADE OF COMPOSITE MATERIALS Russian patent published in 2010 - IPC C04B35/64 C04B33/32 

FIELD: construction.

SUBSTANCE: billets are installed in autoclave with a set of heat resistant inserts, at the inlet of which there is source of working fluid installed, for instance gas generator, and nozzle is installed at the outlet. Specified surfaces of billets are heated with a flow of gaseous working fluid with temperature of 2000-4000 K, at the pressure of 0.2-50 MPa and ambient velocity of 50-900 m/s. Depth δt of wall heating up to specified temperature T and duration of heating τ are determined from the following dependencies: δ_T=ξ_Tτⁿ, ξ_T =f(α), α=f(Re, Pr), where δ_T is depth of billet wall heating to a specified temperature T, ξ_T is coefficient of proportionality, τ is duration of heat treatment, n is exponent of power, α is coefficient of heat emission, Re is Reynolds criterion, Pr is Prandtl criterion. Coefficient ξ_T and exponent of power n are determined experimentally or by calculation, and coefficient α, criterion Re and criterion Pr are determined by calculation. Working fluid used may be represented by inertial gases or combustion products of hydrocarbon liquid or gaseous fuels, and also liquid and solid rocket propellants.

EFFECT: production of composites with specified properties of product thickness or volume.

2 cl, 1 tbl, 1 ex, 9 dwg